Bru
Bru is sourced from a spring in Stoumont, in the Belgian Ardenne, within the province of Liège. The source is a naturally gaseous spring (locally called a “pouhon”), situated within a protected zone of approximately 4,250 hectares. The spring has been in use since the 17th century. The site was acquired by Spa-Monopole in the 1940s; the operating company was renamed S.A. Bru-Chevron in 1985 and absorbed into the Spadel group, the Belgian family business that also owns Spa and Wattwiller. The water takes approximately 50 years to travel through the Ardenne subsoil before reaching the source. Bru holds natural mineral water status.
Mineral composition
| mg/L | |
|---|---|
| Calcium | 21 |
| Magnesium | 19 |
| Sodium | 8 |
| Sulfate | 5 |
| Chloride | 4 |
| Bicarbonate | 180 |
Compositions can vary by season and source. Read our methodology.
Mineral character
Bru is a lightly mineralised, bicarbonate-dominant sparkling water. Bicarbonate is the highest ion at 180 mg/L, with calcium at 21 mg/L and magnesium at 19 mg/L giving a total hardness of 131 mg/L as CaCO₃. Alkalinity is 148 mg/L as CaCO₃. Sulphate (5 mg/L), chloride (4 mg/L), and sodium (8 mg/L) are all very low. TDS is approximately 238 mg/L. The near-equal calcium-to-magnesium ratio (21:19) is distinctive: most waters in the database have calcium considerably exceeding magnesium; here the two are near-equal. In overall character Bru is similar in lightness to Volvic but sparkling, and with notably higher magnesium relative to calcium.
Use-case suitability
- CoffeeNot used in any current coffee recipe, but hardness 131 mg/L sits within the 9–266 mg/L range typical for these targets.
- TeaNot used in any current tea recipe. Hardness 131 mg/L is above the 37–59 mg/L range of these targets.
- BrewingNot used in any current brewing recipe, but hardness 131 mg/L sits within the 26–922 mg/L range typical for these targets.
- BakingNot used in any current baking recipe, but hardness 131 mg/L sits within the 46–390 mg/L range typical for these targets.
- AquariumNot used in any current aquarium recipe, but hardness 131 mg/L sits within the 35–212 mg/L range typical for these targets.
- HorticultureNot used in any current horticulture recipe. Hardness 131 mg/L is above the 12–54 mg/L range of these targets.
Where to buy
BE
Colruyt, Delhaize, Carrefour BE
€0.60-0.75 per litre
Bru is available primarily in Belgium at Colruyt, Delhaize, and Carrefour Belgium, typically €0.60–0.75 (as of March 2026). Distribution outside Belgium is limited. Sold as naturally sparkling.